题干
若x+
=2，则x2+
=____，x3+
=____ ，x4+
=____ ．任意正整数n，猜想：xn+
=____．
| 1 |
| x |
| 1 |
| x |
| 2 |
| 1 |
| x |
| 3 |
| 1 |
| x |
| 4 |
| 1 |
| x |
| n |
答案(点此获取答案解析）
2,2,2,2
